AirHint found the following cheapest return flights from Heraklion (HER) to Sofia (SOF) in December 2025 (see full year).
Return flights
| 30 Dec - 01 Jan | Aegean Airlines | ||
| 31 Dec - 04 Jan | Aegean Airlines | ||
| 28 Dec - 31 Dec | Aegean Airlines | ||
| 28 Dec - 12 Jan | SKY express | ||
| 28 Dec - 08 Jan | SKY express | ||
| 28 Dec - 07 Jan | SKY express |
Also check the deals for one-way flights from Heraklion to Sofia in December.
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